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how to filter array of strings

Posted By:      Posted Date: October 14, 2010    Points: 0   Category :ASP.Net

string[] ar = {"1", "1.1", "1.2", "2", "2.3"};

I need to get the closest match from the array or the next number according to the user input. Say for example if the user enters

input     output

1            1        // exact match

1.3         2        // since 1.3 is not present it should get next match from the arrray

2.1        2.3     // as above comment


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